Real-time river flooding
across America.
Live USGS streamgauge readings, FEMA flood zones, NWS flood watches and warnings, and historical context — one map, refreshed throughout the day. Built for flood researchers, emergency managers, and outdoor recreationists.
What's happening right now
An AI-generated daily summary stitched from active streamgauge readings, NWS warnings, and watershed status.
The United States is experiencing a widespread flooding crisis with multiple regions reporting catastrophic streamflow levels reaching over 600 times normal capacity. The most severe situation is unfolding in the Middle Nueces watershed near Corpus Christi and surrounding Texas communities, where flows have exploded to an unprecedented 672,917% of normal levels. West Matagorda Bay communities near the Texas coast are similarly devastated at 37,531% of normal, while the Bill Williams River region affecting Parker, Arizona has surged to 20,732% of normal capacity. Authorities are urging immediate evacuation in affected areas as these extreme conditions pose life-threatening dangers to residents.
Texas communities are bearing the brunt of this disaster, with the Llano River near Mason and Llano reaching flows of 30,000 cubic feet per second—more than 15,524% of normal—creating dangerous flash flooding conditions throughout the Hill Country. The South Llano near Junction is experiencing similar devastation at 4,511% of normal flow. Arizona is facing its own crisis as communities near Lake Havasu along the Bill Williams River confront massive flooding, while the Gila River near Yuma has reached 8,198% of normal capacity. The Lower Verde River affecting Camp Verde and Cottonwood is at 14,725% of normal, threatening homes and infrastructure with unprecedented water volumes.
The Midwest and Southwest are experiencing compounding emergencies. The Upper Sangamon River near Springfield, Illinois has surged to 3,721% of normal, while Iowa communities along the Skunk River face flows at 2,091% of normal near Ames and surrounding areas. In New Mexico, the Pecos headwaters affecting Santa Fe and Las Vegas are at 8,142% of normal, with the Rio Chama near Española reaching 1,774% of normal. The Little Colorado River near Winslow, Arizona presents extreme danger at 4,359% of normal flow. The Montezuma watershed in Colorado has reached an alarming 360,000% of normal capacity, creating catastrophic conditions near Cortez and Dolores. Residents in all affected areas should seek higher ground immediately, avoid all flooded roadways, and follow evacuation orders as conditions continue to deteriorate rapidly. Emergency services are overwhelmed, and additional federal disaster assistance may be forthcoming.
Rivers currently flooding or rising
Live USGS streamgauge readings aggregated by river. Percent-of-normal compares current flow to the seasonal average.
| River | Observed (cfs) | Seasonal avg (cfs) | vs. Normal |
|---|---|---|---|
| Sangamon River | 253 | 7 | ↑ 3721% of normal |
| Black Warrior River | 233 | 703 | 33% of normal |
| Paskamanset River | 275 | 28 | ↑ 970% of normal |
| Suwannee River | 12,800 | 10,000 | 128% of normal |
| Alamosa River | 191 | 10 | ↑ 1930% of normal |
| Middle Raccoon River | 913 | 135 | ↑ 676% of normal |
| Delaware River | 1,790 | 189 | ↑ 950% of normal |
| Black River | 885 | 88 | ↑ 1005% of normal |
| Llano River | 30,000 | 193 | ↑ 15524% of normal |
| Samish River | 119 | 204 | 58% of normal |
| Florida River | 831 | 30 | ↑ 2763% of normal |
| Solomon River | 413 | 15 | ↑ 2717% of normal |
| Pecos River | 873 | 36 | ↑ 2439% of normal |
| Hillsborough River | 581 | 82 | ↑ 709% of normal |
| Wild Rice River | 19 | 44 | 43% of normal |
| Piedra River | 927 | 84 | ↑ 1104% of normal |
| Cedar River | 202 | 109 | ↑ 185% of normal |
| Animas River | 4,220 | 520 | ↑ 812% of normal |
| Tombigbee River | 5,374 | 10,377 | 52% of normal |
| Conejos River | 1,015 | 98 | ↑ 1033% of normal |
| Guadalupe River | 296 | 45 | ↑ 652% of normal |
| Little Colorado River | 10,440 | 240 | ↑ 4359% of normal |
| Teton River | 401 | 25 | ↑ 1627% of normal |
| Gila River | 746 | 9 | ↑ 8198% of normal |
| Iowa River | 7,800 | 748 | ↑ 1043% of normal |
| Bill Williams River | 4,250 | 21 | ↑ 20732% of normal |
| Raccoon River | 1,310 | 193 | ↑ 679% of normal |
| Straight River | 542 | 87 | ↑ 623% of normal |
| Chariton River | 505 | 16 | ↑ 3258% of normal |
| Withlacoochee River | 366 | 48 | ↑ 771% of normal |
| Minnesota River | 437 | 64 | ↑ 681% of normal |
| Uinta River | 406 | 37 | ↑ 1096% of normal |
| East Verde River | 751 | 5 | ↑ 14725% of normal |
| Peace River | 6,172 | 536 | ↑ 1151% of normal |
| Myakka River | 625 | 103 | ↑ 608% of normal |
| Thief River | 642 | 79 | ↑ 813% of normal |
| Blue Earth River | 2,200 | 207 | ↑ 1065% of normal |
| Little Fork River | 3,720 | 290 | ↑ 1283% of normal |
38 rivers are running elevated right now. Create a free account to see the full list, follow your rivers, and get alerts.
Create Free AccountWatersheds running elevated
Aggregated by HUC8 watershed code. Useful for catchment-level flood-risk assessment.
| HUC8 code | Watershed | Observed (cfs) | vs. Normal |
|---|---|---|---|
| h03160106 | Middle Tombigbee-Lubbub | 1,694 | 122% |
| h12100402 | West Matagorda Bay | 304 | ↑ 37531% |
| h17110005 | Upper Skagit | 1,870 | ↑ 632% |
| h12030108 | Richland | 466 | ↑ 5210% |
| h17110002 | Strait Of Georgia | 119 | 58% |
| h13060001 | Pecos Headwaters | 390 | ↑ 8142% |
| h12090204 | Llano | 30,000 | ↑ 15524% |
| h10280201 | Upper Chariton | 505 | ↑ 3258% |
| h15030204 | Bill Williams | 4,250 | ↑ 20732% |
| h03110205 | Lower Suwannee | 12,800 | 128% |
| h13020102 | Rio Chama | 951 | ↑ 1774% |
| h10030203 | Marias | 401 | ↑ 1627% |
| h13070001 | Lower Pecos-Red Bluff Reservoir | 290 | ↑ 2636% |
| h03100208 | Withlacoochee | 366 | ↑ 771% |
| h01090001 | Charles | 312 | ↑ 1031% |
| h07040002 | Cannon | 542 | ↑ 623% |
| h12110105 | Middle Nueces | 3,230 | ↑ 672917% |
| h14060003 | Duchesne | 406 | ↑ 1096% |
| h03100205 | Hillsborough | 581 | ↑ 709% |
| h03100101 | Peace | 13,935 | ↑ 1374% |
| h03100102 | Myakka | 625 | ↑ 608% |
| h07080105 | South Skunk | 484 | ↑ 1956% |
| h07130006 | Upper Sangamon | 253 | ↑ 3721% |
| h09030005 | Little Fork | 3,720 | ↑ 1283% |
| h14080203 | Montezuma | 180 | ↑ 360000% |
| h15070101 | Lower Gila-Painted Rock Reservoir | 746 | ↑ 8198% |
| h15020018 | Moenkopi Wash | 5 | ↑ 255% |
| h03080103 | Lower St. Johns | 118,689 | 82% |
| h07020012 | Lower Minnesota | 335 | ↑ 1430% |
| h07020011 | Le Sueur | 2,070 | ↑ 2654% |
| h03160201 | Middle Tombigbee-Chickasaw | 3,680 | 41% |
| h10270103 | Delaware | 1,790 | ↑ 950% |
| h13010005 | Conejos | 1,257 | ↑ 1141% |
| h15060203 | Lower Verde | 751 | ↑ 14725% |
| h03080202 | Cape Canaveral | 980 | ↑ 1376% |
| h03080203 | Vero Beach | 1,187 | ↑ 895% |
| h07100009 | Lower Des Moines | 21,000 | ↑ 933% |
| h03160113 | Lower Black Warrior | 233 | 33% |
| h15060101 | Black | 885 | ↑ 1005% |
| h07100007 | South Raccoon | 913 | ↑ 676% |
| h07100006 | North Raccoon | 1,310 | ↑ 679% |
| h12090203 | South Llano | 2,950 | ↑ 4511% |
| h10260015 | Solomon | 413 | ↑ 2717% |
| h07080107 | Skunk | 438 | ↑ 2091% |
| h07080207 | Upper Iowa | 393 | ↑ 875% |
| h12100201 | Upper Guadalupe | 296 | ↑ 652% |
| h02020004 | Mohawk | 534 | ↑ 1613% |
| h13060011 | Upper Pecos-Black | 193 | ↑ 965% |
| h03090102 | Northern Okeechobee Inflow | 366 | ↑ 1030% |
| h03090103 | Western Okeechobee Inflow | 1,770 | ↑ 957% |
| h03090101 | Kissimmee | 347 | ↑ 798% |
| h03080101 | Upper St. Johns | 35,167 | ↑ 343% |
| h09020105 | Western Wild Rice | 19 | 43% |
| h14080201 | Lower San Juan-Four Corners | 4,850 | ↑ 675% |
| h15020016 | Lower Little Colorado | 10,440 | ↑ 4359% |
| h03180002 | Middle Pearl-Strong | 435 | ↑ 7909% |
| h12040104 | Buffalo-San Jacinto | 1,117 | ↑ 1431% |
| h07120004 | Des Plaines | 232 | 100% |
| h07080208 | Middle Iowa | 8,580 | ↑ 995% |
| h09020304 | Thief | 642 | ↑ 813% |
| h01090002 | Cape Cod | 275 | ↑ 970% |
| h14080102 | Piedra | 927 | ↑ 1104% |
| h13010001 | Rio Grande Headwaters | 2,279 | ↑ 663% |
| h13010002 | Alamosa-Trinchera | 3,201 | ↑ 1416% |
| h13020211 | Elephant Butte Reservoir | 3,400 | ↑ 601% |
| h07020009 | Blue Earth | 2,200 | ↑ 1065% |
| h05130202 | Lower Cumberland-Sycamore | 4,860 | ↑ 607% |
| h14080104 | Animas | 5,051 | ↑ 919% |
| h07020001 | Upper Minnesota | 437 | ↑ 681% |
| h14080101 | Upper San Juan | 3,150 | ↑ 5801% |
70 watersheds are running elevated. Create a free account to see every basin.
Create Free AccountMonitoring & response toolkit
Everything on this page links into Snoflo’s gauge-level data — drill from a national view down to the readings on a single river.
Gauge-level flow reports
Every USGS streamgauge by state — live discharge, gage height, NWS flood stages, and the complete observation history.
Browse gauges →15-day flow forecasts
PULSE probabilistic outlooks on every gauge — median, likely range, and projected stage, refreshed daily.
How PULSE works →Engineering data & reports
Flow-duration statistics, observed peak context, CSV exports, and printable conditions reports for any gauge and date range.
Snoflo for Engineering →Interactive national map
Layer gauges, warnings, watersheds, rain, and recreation across the country on one map.
Open the map →What causes river flooding
Flooding is rarely a single-cause event — multiple factors usually compound. The most common drivers across the U.S.
Heavy rainfall
Persistent rain saturates soils and overwhelms drainage networks. Tropical systems and atmospheric rivers are the worst culprits.
Rapid snowmelt
Spring melt pulses can deliver months of accumulated water in days — especially when warm rain falls on existing snowpack.
Ice jams
Breakup ice can block channels, forcing water to back up and inundate upstream banks. Common on northern rivers in early spring.
Storm surge
Coastal hurricanes push seawater inland. Surge combined with rainfall is the deadliest flood scenario in U.S. history.
Reservoir releases
Controlled dam releases can dramatically increase downstream flow. USACE and USBR publish release schedules, but conditions change fast.
Burn scars
Wildfire-stripped slopes can't absorb rainfall — even modest storms produce dangerous flash floods on burned watersheds for years afterward.
Flood preparedness checklist
Floodwaters rise faster than most people expect. The basics that save lives.
Flood map & river monitoring FAQ
What does "percent of normal" mean?
The current flow at a gauge compared to its seasonal average for this date. 100% means flow is right at the historical norm. 200%+ means twice the typical flow — a strong indicator of flood conditions on small-to-medium rivers. Every gauge-level flow report shows its live percent-of-normal.
What's the difference between a flood watch and a flood warning?
Watch: conditions are favorable for flooding within the next 12–48 hours. Warning: flooding is happening or imminent. Both come from the National Weather Service. Snoflo overlays both as toggleable layers on the map above.
How often does Snoflo's data refresh?
USGS streamgauge readings update every 15 minutes; we re-pull every hour. NWS warning polygons update as the NWS issues them — usually within 5 minutes. FEMA flood zones are static (the National Flood Hazard Layer is updated quarterly).
What is the FEMA flood zone layer?
FEMA's National Flood Hazard Layer (NFHL) shows the 1%-annual-chance ("100-year") and 0.2%-annual-chance ("500-year") floodplains. These are based on long-term hydrologic modeling, not current conditions. Useful for property risk; not a real-time signal.
Can I get an alert when my local river floods?
Yes. Save any USGS gauge as a favorite in the Snoflo iOS app, set a threshold (e.g. "alert me at 20 ft stage"), and you'll get a push the moment it crosses. Free with a Snoflo account.
Is Snoflo a substitute for official warnings?
No. Snoflo is informational. For life-safety decisions always follow guidance from local emergency management, the NWS, and law enforcement.
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